Class InternalEdgeRemovingCollector

internal edge removing collector - eliminates "ghost collisions" that occur when a convex object slides across internal edges of a triangle mesh or compound shape.

this collector wraps another collector and delays processing of edge/vertex contacts to determine if they are on internal edges based on the full contact set. face contacts are forwarded immediately.

the algorithm:

1. collect all hits during addHit calls
2. forward face contacts immediately (contact normal aligns with face normal within 1 degree)
3. delay edge/vertex contacts for later processing
4. on flush (typically called at end of body collision):
   • sort delayed results by penetration depth (deepest first)
   • for each result, find closest feature (vertex or edge)
   • if feature is already "voided" by a deeper contact, skip it
   • otherwise forward to chained collector and void all vertices of this face

this ensures that internal edges between coplanar/near-coplanar faces are ignored, preventing stuttering when objects slide across multi-primitive surfaces.